﻿
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace DotNet.Utilities.正则表达式
{
    class 常用的正则表达式
    {
        //验证是否是ipv4
        string a = @"(((\d{1,2})|(1\d{2})|(2[0-4]\d)|(25[0-5]))\.){3}((\d{1,2})|(1\d{2})|(2[0-4]\d)|(25[0-5]))";
    }
}
